archived-doc-pt-br/reference/event/eventhttp/construct.xml

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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="eventhttp.construct">
 <refnamediv>
  <refname>EventHttp::__construct</refname>
  <refpurpose>Constrói objeto EventHttp (o servidor HTTP)</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>public</modifier>
   <methodname>EventHttp::__construct</methodname>
   <methodparam>
    <type>EventBase</type>
    <parameter>base</parameter>
   </methodparam>
   <methodparam choice="opt">
    <type>EventSslContext</type>
    <parameter>ctx</parameter>
    <initializer>&null;</initializer>
   </methodparam>
  </methodsynopsis>
  <para>
   Constrói o objeto do servidor HTTP.
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term>
     <parameter>base</parameter>
    </term>
    <listitem>
     <para>
      Base de eventos associada.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term>
     <parameter>ctx</parameter>
    </term>
    <listitem>
     <para>
      Objeto da classe <classname>EventSslContext</classname>.
      Transforma servidor HTTP simples em servidor HTTPS. Isso significa que
      se
      <parameter>ctx</parameter>
      estiver configurado corretamente, os eventos de buffer subjacentes serão baseados
      em soquetes OpenSSL. Assim, todo o tráfego passará pelo SSL ou TLS.
     </para>
     <note>
      <para>
       Este parâmetro está disponível somente se
       <literal>Event</literal>
       for compilado com suporte OpenSSL e somente com
       <literal>Libevent
       2.1.0-alpha</literal>
       e superior.
      </para>
     </note>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>
 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>PECL event 1.9.0</entry>
      <entry>
       Suporte OpenSSL (<parameter>ctx</parameter>) adicionado.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>
 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title>Servidor HTTP simples</title>
   <programlisting role="php">
<![CDATA[
<?php
/*
 * Servidor HTTP simples.
 *
 * Para testar:
 * 1) Execute-o em uma porta de sua escolha, por exemplo:
 * $ php examples/http.php 8010
 * 2) Em outro terminal, conecte-se a algum endereço nesta porta
 * e faça uma solicitação GET ou POST (outras são desativadas aqui), por exemplo:
 * $ nc -t 127.0.0.1 8010
 * POST /about HTTP/1.0
 * Content-Type: text/plain
 * Content-Length: 4
 * Connection: close
 * (pressione Enter)
 *
 * Resultado:
 * a=12
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 *
 * $ nc -t 127.0.0.1 8010
 * GET /dump HTTP/1.0
 * Content-Type: text/plain
 * Content-Encoding: UTF-8
 * Connection: close
 * (pressione Enter)
 *
 * Resultado:
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 * (pressione Enter)
 *
 * $ nc -t 127.0.0.1 8010
 * GET /unknown HTTP/1.0
 * Connection: close
 *
 * Resultado:
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 *
 * 3) Veja o que o servidor exibe na janela do terminal anterior.
 */

function _http_dump($req, $data) {
    static $counter      = 0;
    static $max_requests = 2;

    if (++$counter >= $max_requests)  {
        echo "O contador atingiu o máximo de solicitações $max_requests. Saindo\n";
        exit();
    }

    echo __METHOD__, " chamado\n";
    echo "requisição:"; var_dump($req);
    echo "dados:"; var_dump($data);

    echo "\n===== DUMP =====\n";
    echo "Comando:", $req->getCommand(), PHP_EOL;
    echo "URI:", $req->getUri(), PHP_EOL;
    echo "Cabeçalhos de entrada:"; var_dump($req->getInputHeaders());
    echo "Cabeçalhos de saída:"; var_dump($req->getOutputHeaders());

    echo "\n >> Enviando resposta ...";
    $req->sendReply(200, "OK");
    echo "OK\n";

    echo "\n >> Lendo buffer de entrada ...\n";
    $buf = $req->getInputBuffer();
    while ($s = $buf->readLine(EventBuffer::EOL_ANY)) {
        echo $s, PHP_EOL;
    }
    echo "Não há mais dados no buffer\n";
}

function _http_about($req) {
    echo __METHOD__, PHP_EOL;
    echo "URI: ", $req->getUri(), PHP_EOL;
    echo "\n >> Enviando resposta ...";
    $req->sendReply(200, "OK");
    echo "OK\n";
}

function _http_default($req, $data) {
    echo __METHOD__, PHP_EOL;
    echo "URI: ", $req->getUri(), PHP_EOL;
    echo "\n >> Enviando resposta ...";
    $req->sendReply(200, "OK");
    echo "OK\n";
}

$port = 8010;
if ($argc > 1) {
    $port = (int) $argv[1];
}
if ($port <= 0 || $port > 65535) {
    exit("Porta inválida");
}

$base = new EventBase();
$http = new EventHttp($base);
$http->setAllowedMethods(EventHttpRequest::CMD_GET | EventHttpRequest::CMD_POST);

$http->setCallback("/dump", "_http_dump", array(4, 8));
$http->setCallback("/about", "_http_about");
$http->setDefaultCallback("_http_default", "valor de dados personalizados");

$http->bind("0.0.0.0", 8010);
$base->loop();
?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
a=12
HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close

HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close
(pressione Enter)

HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close
]]>
   </screen>
  </example>
 </refsect1>
</refentry>
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